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This file tabulates the collision strengths on a fairly standard
grid, however care should be taken when using this ADF04 type 1
file, and any other type 1 file, because the tabulation may not
be fine enough to form a well defined convolution with the
distribution function being used. More information on this can be
obtained from the compiler of this data set.
This data incorporates the neutral helium R-matrix calculation of
Ballance (2003). This calculation included detailed representation
of the resonance region. Interval averaging techniques were used
to convert the OMEGA file produced by the R-matrix calculation to
a manageable size (Paton, 2003).
The main differences between this data and previous ADAS preferred
data lies at low energy.
This data comprises components from the following workbooks
(1) he0_excitation_1s(1S)-nl().xls
(2) he0_excitation_2s(3S)-nl().xls
(3) he0_excitation_2s(1S)-nl().xls
(4) he0_excitation_2p(1P)-nl().xls
(5) he0_excitation_2p(3P)-nl().xls
(6) he0_excitation_3s(1S)-nl().xls
(7) he0_excitation_3s(3S)-nl().xls
(8) he0_excitation_3p(1P)-nl().xls
(9) he0_excitation_3p(3P)-nl().xls
(10) he0_excitation_3d(1D)-nl().xls
(11) he0_excitation_3d(3D)-nl().xls
(12) he0_excitation_4s(1S)-nl().xls
(13) he0_excitation_4s(3S)-nl().xls
(14) he0_excitation_4p(3P)-nl().xls
(15) he0_excitation_4d(1D)-nl().xls
(16) he0_excitation_4d(3D)-nl().xls
(17) he0_excitation_4f(1F)-nl().xls
(18) he0_excitation_4f(3F)-nl().xls
(19) he0_ionisation.xls
The workbooks contain historic comparative assessments of helium
data and ADAS preferred data sets. The workbooks are available
to identified data assessors for further study.
Compiler: I. D. Paton, University of Strathclyde
Email: paton@phys.strath.ac.uk
Date: 15 April 2004
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